Nutrient ratios driven by vertical stratification regulate phytoplankton community structure in the oligotrophic western Pacific Ocean
文献类型： 外文期刊
作者： Chen, Zhuo 1 ; Sun, Jun 2 ; Gu, Ting 3 ; Zhang, Guicheng 3 ; Wei, Yuqiu 4 ;
作者机构： 1.Tianjin Univ Sci & Technol, Coll Biotechnol, Tianjin 300457, Peoples R China
2.China Univ Geosci Wuhan, Coll Marine Sci & Technol, Wuhan 430074, Hubei, Peoples R China
3.Tianjin Univ Sci & Technol, Res Ctr Indian Ocean Ecosyst, Tianjin 300457, Peoples R China
4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
期刊名称：OCEAN SCIENCE （ 影响因子：4.311； 五年影响因子：4.041 ）
ISSN： 1812-0784
年卷期： 2021 年 17 卷 6 期
页码：
收录情况： SCI
摘要： The stratification of the upper oligotrophic ocean has a direct impact on biogeochemistry by regulating the components of the upper-ocean environment that are critical to biological productivity, such as light availability for photosynthesis and nutrient supply from the deep ocean. We investigated the spatial distribution pattern and diversity of phytoplankton communities in the western Pacific Ocean (WPO) in the autumn of 2016, 2017, and 2018. Our results showed the phytoplankton community structure mainly consisted of cyanobacteria, diatoms, and dinoflagellates, while the abundance of Chrysophyceae was negligible. Phytoplankton abundance was high from the equatorial region to 10 degrees N and decreased with increasing latitude in spatial distribution. Phytoplankton also showed a strong variation in the vertical distribution. The potential influences of physicochemical parameters on phytoplankton abundance were analyzed by a structural equation model (SEM) to determine nutrient ratios driven by vertical stratification to regulate phytoplankton community structure in the typical oligotrophic ocean. Regions with strong vertical stratification were more favorable for cyanobacteria, whereas weak vertical stratification was more conducive to diatoms and dinoflagellates. Our study shows that stratification is a major determinant of phytoplankton community structure and highlights that physical processes in the ocean control phytoplankton community structure by driving the balance of chemical elements, providing a database to better predict models of changes in phytoplankton community structure under future ocean scenarios.
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